reclaiming arin IP allocations?

[goemon () anime net]

web.com/netsol is disavowing ownership of 209.17.115.109.

NetRange:       209.17.112.0 - 209.17.127.255
CIDR:           209.17.112.0/20
NetName:        WEB-COM-BLK3
NetHandle:      NET-209-17-112-0-1
Parent:         NET209 (NET-209-0-0-0-0)

What is the process to get this netblock reclaimed?

-Dan